ssb: Convert to use of the new SPROM structure

In disagreement with the SPROM specs, revision 3 devices appear to have
moved the MAC address.

Change ssb to handle the revision 4 SPROM, which is a different size.
This change in size is handled by adding a new variable to the ssb_sprom
struct and using it whenever possible. For those routines that do not
have access to this structure, a 'u16 size' argument is added.

The new PCI_ID for the BCM4328 is also added.

Testing of the Revision 4 SPROM, which is used on the BCM4328, was done
by Michael Gerdau <mgerdau@tiscali.de>.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 142 insertions, 93 deletions

diff --git a/drivers/ssb/b43_pci_bridge.c b/drivers/ssb/b43_pci_bridge.c
index f145d8a4cfde..b8b7cb0b436a 100644
--- a/drivers/ssb/b43_pci_bridge.c
+++ b/drivers/ssb/b43_pci_bridge.c
@@ -27,6 +27,7 @@ static const struct pci_device_id b43_pci_bridge_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4321) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4324) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4325) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4328) },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, b43_pci_bridge_tbl);
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 85a20546e827..9028ed5715a1 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -872,14 +872,22 @@ EXPORT_SYMBOL(ssb_clockspeed);
 
 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
 {
+	u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
+
 	/* The REJECT bit changed position in TMSLOW between
 	 * Backplane revisions. */
-	switch (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV) {
+	switch (rev) {
 	case SSB_IDLOW_SSBREV_22:
 		return SSB_TMSLOW_REJECT_22;
 	case SSB_IDLOW_SSBREV_23:
 		return SSB_TMSLOW_REJECT_23;
+	case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
+	case SSB_IDLOW_SSBREV_25:     /* same here */
+	case SSB_IDLOW_SSBREV_26:     /* same here */
+	case SSB_IDLOW_SSBREV_27:     /* same here */
+		return SSB_TMSLOW_REJECT_23;	/* this is a guess */
 	default:
+		printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
 		WARN_ON(1);
 	}
 	return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c
index 7226a716acdf..8f600fcd2430 100644
--- a/drivers/ssb/pci.c
+++ b/drivers/ssb/pci.c
@@ -212,29 +212,29 @@ static inline u8 ssb_crc8(u8 crc, u8 data)
 	return t[crc ^ data];
 }
 
-static u8 ssb_sprom_crc(const u16 *sprom)
+static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
 {
 	int word;
 	u8 crc = 0xFF;
 
-	for (word = 0; word < SSB_SPROMSIZE_WORDS - 1; word++) {
+	for (word = 0; word < size - 1; word++) {
 		crc = ssb_crc8(crc, sprom[word] & 0x00FF);
 		crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
 	}
-	crc = ssb_crc8(crc, sprom[SPOFF(SSB_SPROM_REVISION)] & 0x00FF);
+	crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
 	crc ^= 0xFF;
 
 	return crc;
 }
 
-static int sprom_check_crc(const u16 *sprom)
+static int sprom_check_crc(const u16 *sprom, u16 size)
 {
 	u8 crc;
 	u8 expected_crc;
 	u16 tmp;
 
-	crc = ssb_sprom_crc(sprom);
-	tmp = sprom[SPOFF(SSB_SPROM_REVISION)] & SSB_SPROM_REVISION_CRC;
+	crc = ssb_sprom_crc(sprom, size);
+	tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
 	expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
 	if (crc != expected_crc)
 		return -EPROTO;
@@ -246,7 +246,7 @@ static void sprom_do_read(struct ssb_bus *bus, u16 *sprom)
 {
 	int i;
 
-	for (i = 0; i < SSB_SPROMSIZE_WORDS; i++)
+	for (i = 0; i < bus->sprom_size; i++)
 		sprom[i] = readw(bus->mmio + SSB_SPROM_BASE + (i * 2));
 }
 
@@ -255,6 +255,7 @@ static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
 	struct pci_dev *pdev = bus->host_pci;
 	int i, err;
 	u32 spromctl;
+	u16 size = bus->sprom_size;
 
 	ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
 	err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
@@ -266,12 +267,12 @@ static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
 		goto err_ctlreg;
 	ssb_printk(KERN_NOTICE PFX "[ 0%%");
 	msleep(500);
-	for (i = 0; i < SSB_SPROMSIZE_WORDS; i++) {
-		if (i == SSB_SPROMSIZE_WORDS / 4)
+	for (i = 0; i < size; i++) {
+		if (i == size / 4)
 			ssb_printk("25%%");
-		else if (i == SSB_SPROMSIZE_WORDS / 2)
+		else if (i == size / 2)
 			ssb_printk("50%%");
-		else if (i == (SSB_SPROMSIZE_WORDS / 4) * 3)
+		else if (i == (size * 3) / 4)
 			ssb_printk("75%%");
 		else if (i % 2)
 			ssb_printk(".");
@@ -350,95 +351,120 @@ static void sprom_extract_r1(struct ssb_sprom_r1 *out, const u16 *in)
 	SPEX(antenna_gain_a, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_A, 0);
 	SPEX(antenna_gain_bg, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_BG,
 	     SSB_SPROM1_AGAIN_BG_SHIFT);
-	for (i = 0; i < 4; i++) {
-		v = in[SPOFF(SSB_SPROM1_OEM) + i];
-		*(((__le16 *)out->oem) + i) = cpu_to_le16(v);
-	}
 }
 
-static void sprom_extract_r2(struct ssb_sprom_r2 *out, const u16 *in)
+static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
 {
 	int i;
 	u16 v;
+	u16 loc[3];
 
-	SPEX(boardflags_hi, SSB_SPROM2_BFLHI,  0xFFFF, 0);
-	SPEX(maxpwr_a_hi, SSB_SPROM2_MAXP_A, SSB_SPROM2_MAXP_A_HI, 0);
-	SPEX(maxpwr_a_lo, SSB_SPROM2_MAXP_A, SSB_SPROM2_MAXP_A_LO,
-	     SSB_SPROM2_MAXP_A_LO_SHIFT);
-	SPEX(pa1lob0, SSB_SPROM2_PA1LOB0, 0xFFFF, 0);
-	SPEX(pa1lob1, SSB_SPROM2_PA1LOB1, 0xFFFF, 0);
-	SPEX(pa1lob2, SSB_SPROM2_PA1LOB2, 0xFFFF, 0);
-	SPEX(pa1hib0, SSB_SPROM2_PA1HIB0, 0xFFFF, 0);
-	SPEX(pa1hib1, SSB_SPROM2_PA1HIB1, 0xFFFF, 0);
-	SPEX(pa1hib2, SSB_SPROM2_PA1HIB2, 0xFFFF, 0);
-	SPEX(ofdm_pwr_off, SSB_SPROM2_OPO, SSB_SPROM2_OPO_VALUE, 0);
-	for (i = 0; i < 4; i++) {
-		v = in[SPOFF(SSB_SPROM2_CCODE) + i];
-		*(((__le16 *)out->country_str) + i) = cpu_to_le16(v);
+	if (out->revision == 3) {			/* rev 3 moved MAC */
+		loc[0] = SSB_SPROM3_IL0MAC;
+		loc[1] = SSB_SPROM3_ET0MAC;
+		loc[2] = SSB_SPROM3_ET1MAC;
+	} else {
+		loc[0] = SSB_SPROM1_IL0MAC;
+		loc[1] = SSB_SPROM1_ET0MAC;
+		loc[2] = SSB_SPROM1_ET1MAC;
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[0]) + i];
+		*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[1]) + i];
+		*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(loc[2]) + i];
+		*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
 	}
+	SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
+	SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
+	     SSB_SPROM1_ETHPHY_ET1A_SHIFT);
+	SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
+	     SSB_SPROM1_BINF_CCODE_SHIFT);
+	SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
+	SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
+	SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
+	SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
+	SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
+	SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
+	SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
+	SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
+	     SSB_SPROM1_GPIOA_P1_SHIFT);
+	SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
+	SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
+	     SSB_SPROM1_GPIOB_P3_SHIFT);
+	SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
+	     SSB_SPROM1_MAXPWR_A_SHIFT);
+	SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
+	SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
+	     SSB_SPROM1_ITSSI_A_SHIFT);
+	SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
+	SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
+	SPEX(antenna_gain_a, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_A, 0);
+	SPEX(antenna_gain_bg, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_BG,
+	     SSB_SPROM1_AGAIN_BG_SHIFT);
 }
 
-static void sprom_extract_r3(struct ssb_sprom_r3 *out, const u16 *in)
+static void sprom_extract_r4(struct ssb_sprom *out, const u16 *in)
 {
-	out->ofdmapo  = (in[SPOFF(SSB_SPROM3_OFDMAPO) + 0] & 0xFF00) >> 8;
-	out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 0] & 0x00FF) << 8;
-	out->ofdmapo <<= 16;
-	out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 1] & 0xFF00) >> 8;
-	out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 1] & 0x00FF) << 8;
-
-	out->ofdmalpo  = (in[SPOFF(SSB_SPROM3_OFDMALPO) + 0] & 0xFF00) >> 8;
-	out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 0] & 0x00FF) << 8;
-	out->ofdmalpo <<= 16;
-	out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 1] & 0xFF00) >> 8;
-	out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 1] & 0x00FF) << 8;
-
-	out->ofdmahpo  = (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 0] & 0xFF00) >> 8;
-	out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 0] & 0x00FF) << 8;
-	out->ofdmahpo <<= 16;
-	out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 1] & 0xFF00) >> 8;
-	out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 1] & 0x00FF) << 8;
-
-	SPEX(gpioldc_on_cnt, SSB_SPROM3_GPIOLDC, SSB_SPROM3_GPIOLDC_ON,
-	     SSB_SPROM3_GPIOLDC_ON_SHIFT);
-	SPEX(gpioldc_off_cnt, SSB_SPROM3_GPIOLDC, SSB_SPROM3_GPIOLDC_OFF,
-	     SSB_SPROM3_GPIOLDC_OFF_SHIFT);
-	SPEX(cckpo_1M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_1M, 0);
-	SPEX(cckpo_2M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_2M,
-	     SSB_SPROM3_CCKPO_2M_SHIFT);
-	SPEX(cckpo_55M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_55M,
-	     SSB_SPROM3_CCKPO_55M_SHIFT);
-	SPEX(cckpo_11M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_11M,
-	     SSB_SPROM3_CCKPO_11M_SHIFT);
-
-	out->ofdmgpo  = (in[SPOFF(SSB_SPROM3_OFDMGPO) + 0] & 0xFF00) >> 8;
-	out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 0] & 0x00FF) << 8;
-	out->ofdmgpo <<= 16;
-	out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 1] & 0xFF00) >> 8;
-	out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 1] & 0x00FF) << 8;
+	int i;
+	u16 v;
+
+	/* extract the r1 variables */
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_IL0MAC) + i];
+		*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_ET0MAC) + i];
+		*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
+	}
+	for (i = 0; i < 3; i++) {
+		v = in[SPOFF(SSB_SPROM4_ET1MAC) + i];
+		*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
+	}
+	SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
+	SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
+	     SSB_SPROM4_ETHPHY_ET1A_SHIFT);
+	SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
+	SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
+	SPEX(antenna_gain_a, SSB_SPROM4_AGAIN, SSB_SPROM4_AGAIN_0, 0);
+	SPEX(antenna_gain_bg, SSB_SPROM4_AGAIN, SSB_SPROM4_AGAIN_1,
+	     SSB_SPROM4_AGAIN_1_SHIFT);
+	/* TODO - get remaining rev 4 stuff needed */
 }
 
-static int sprom_extract(struct ssb_bus *bus,
-			 struct ssb_sprom *out, const u16 *in)
+static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
+			 const u16 *in, u16 size)
 {
 	memset(out, 0, sizeof(*out));
 
-	SPEX(revision, SSB_SPROM_REVISION, SSB_SPROM_REVISION_REV, 0);
-
+	out->revision = in[size - 1] & 0x00FF;
 	if ((bus->chip_id & 0xFF00) == 0x4400) {
 		/* Workaround: The BCM44XX chip has a stupid revision
 		 * number stored in the SPROM.
 		 * Always extract r1. */
+		out->revision = 1;
+		sprom_extract_r123(out, in);
 		sprom_extract_r1(&out->r1, in);
+	} else if (bus->chip_id == 0x4321) {
+		/* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
+		out->revision = 4;
+		sprom_extract_r4(out, in);
 	} else {
 		if (out->revision == 0)
 			goto unsupported;
-		if (out->revision >= 1 && out->revision <= 3)
+		if (out->revision >= 1 && out->revision <= 3) {
+			sprom_extract_r123(out, in);
 			sprom_extract_r1(&out->r1, in);
-		if (out->revision >= 2 && out->revision <= 3)
-			sprom_extract_r2(&out->r2, in);
-		if (out->revision == 3)
-			sprom_extract_r3(&out->r3, in);
-		if (out->revision >= 4)
+		}
+		if (out->revision == 4)
+			sprom_extract_r4(out, in);
+		if (out->revision >= 5)
 			goto unsupported;
 	}
 
@@ -456,16 +482,31 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus,
 	int err = -ENOMEM;
 	u16 *buf;
 
-	buf = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
+	buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
 	if (!buf)
 		goto out;
+	bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
 	sprom_do_read(bus, buf);
-	err = sprom_check_crc(buf);
+	err = sprom_check_crc(buf, bus->sprom_size);
 	if (err) {
-		ssb_printk(KERN_WARNING PFX
-			   "WARNING: Invalid SPROM CRC (corrupt SPROM)\n");
+		/* check for rev 4 sprom - has special signature */
+		if (buf [32] == 0x5372) {
+			ssb_printk(KERN_WARNING PFX "Extracting a rev 4"
+				   " SPROM\n");
+			kfree(buf);
+			buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
+				      GFP_KERNEL);
+			if (!buf)
+				goto out;
+			bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
+			sprom_do_read(bus, buf);
+			err = sprom_check_crc(buf, bus->sprom_size);
+		}
+		if (err)
+			ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
+				   " SPROM CRC (corrupt SPROM)\n");
 	}
-	err = sprom_extract(bus, sprom, buf);
+	err = sprom_extract(bus, sprom, buf, bus->sprom_size);
 
 	kfree(buf);
 out:
@@ -579,29 +620,28 @@ const struct ssb_bus_ops ssb_pci_ops = {
 	.write32	= ssb_pci_write32,
 };
 
-static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len)
+static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len, u16 size)
 {
 	int i, pos = 0;
 
-	for (i = 0; i < SSB_SPROMSIZE_WORDS; i++) {
+	for (i = 0; i < size; i++)
 		pos += snprintf(buf + pos, buf_len - pos - 1,
 				"%04X", swab16(sprom[i]) & 0xFFFF);
-	}
 	pos += snprintf(buf + pos, buf_len - pos - 1, "\n");
 
 	return pos + 1;
 }
 
-static int hex2sprom(u16 *sprom, const char *dump, size_t len)
+static int hex2sprom(u16 *sprom, const char *dump, size_t len, u16 size)
 {
 	char tmp[5] = { 0 };
 	int cnt = 0;
 	unsigned long parsed;
 
-	if (len < SSB_SPROMSIZE_BYTES * 2)
+	if (len < size * 2)
 		return -EINVAL;
 
-	while (cnt < SSB_SPROMSIZE_WORDS) {
+	while (cnt < size) {
 		memcpy(tmp, dump, 4);
 		dump += 4;
 		parsed = simple_strtoul(tmp, NULL, 16);
@@ -625,7 +665,7 @@ static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
 	if (!bus)
 		goto out;
 	err = -ENOMEM;
-	sprom = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
+	sprom = kcalloc(bus->sprom_size, sizeof(u16), GFP_KERNEL);
 	if (!sprom)
 		goto out;
 
@@ -638,7 +678,7 @@ static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
 	sprom_do_read(bus, sprom);
 	mutex_unlock(&bus->pci_sprom_mutex);
 
-	count = sprom2hex(sprom, buf, PAGE_SIZE);
+	count = sprom2hex(sprom, buf, PAGE_SIZE, bus->sprom_size);
 	err = 0;
 
 out_kfree:
@@ -660,15 +700,15 @@ static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
 	if (!bus)
 		goto out;
 	err = -ENOMEM;
-	sprom = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
+	sprom = kcalloc(bus->sprom_size, sizeof(u16), GFP_KERNEL);
 	if (!sprom)
 		goto out;
-	err = hex2sprom(sprom, buf, count);
+	err = hex2sprom(sprom, buf, count, bus->sprom_size);
 	if (err) {
 		err = -EINVAL;
 		goto out_kfree;
 	}
-	err = sprom_check_crc(sprom);
+	err = sprom_check_crc(sprom, bus->sprom_size);
 	if (err) {
 		err = -EINVAL;
 		goto out_kfree;