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authorAlexandre Bounine <alexandre.bounine@idt.com>2010-10-27 15:34:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-27 18:03:16 -0700
commit388c45ccfaeec68e334ad79edeb0b5b0a43197ff (patch)
tree5a9e98d4ba6427d542ed7f384c31774cb625bff8 /drivers/rapidio
parentaf84ca38aff94061dd0711edbb99b0900a9c28fd (diff)
downloadlinux-388c45ccfaeec68e334ad79edeb0b5b0a43197ff.tar.gz
rapidio: fix IDLE2 bits corruption
RapidIO spec v.2.1 adds Idle Sequence 2 into LP-Serial Physical Layer.
The fix ensures that corresponding bits are not corrupted during error
handling.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio')
-rw-r--r--drivers/rapidio/rio.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index 7f18a65c4ed0..68cf0c99138a 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -871,15 +871,10 @@ int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg)
 			rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
 	}
 
-	/* Clear remaining error bits */
+	/* Clear remaining error bits and Port-Write Pending bit */
 	rio_mport_write_config_32(mport, destid, hopcount,
 			rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
-			err_status & RIO_PORT_N_ERR_STS_CLR_MASK);
-
-	/* Clear Port-Write Pending bit */
-	rio_mport_write_config_32(mport, destid, hopcount,
-			rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
-			RIO_PORT_N_ERR_STS_PW_PEND);
+			err_status);
 
 	return 0;
 }