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| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-04 16:19:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-15 18:20:34 +0100 |
| commit | 298ac860af9a0b604bcf06749a6acbd07548db99 (patch) | |
| tree | a069ce7255282b46fa3691603ec72185ff8d9818 | |
| parent | b0ae33a2d2fb6c55117b377ec4ae3f2c84eab6a2 (diff) | |
| download | linux-298ac860af9a0b604bcf06749a6acbd07548db99.tar.gz | |
usb: early: xhci-dbc: Fix xdbc number parsing
kstrtoul() assumes the string contains the number only and is \0 terminated, this is not the case, as such things like: earlyprintk=xdbc1,keep go completely sideways. Use simple_strtoul() instead. Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220304152136.035911620@infradead.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/early/xhci-dbc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 100a45d26b5a..bfb7e2b85299 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early/xhci-dbc.c @@ -603,6 +603,7 @@ int __init early_xdbc_parse_parameter(char *s, int keep_early) { unsigned long dbgp_num = 0; u32 bus, dev, func, offset; + char *e; int ret; if (!early_pci_allowed()) @@ -613,8 +614,11 @@ int __init early_xdbc_parse_parameter(char *s, int keep_early) if (xdbc.xdbc_reg) return 0; - if (*s && kstrtoul(s, 0, &dbgp_num)) - dbgp_num = 0; + if (*s) { + dbgp_num = simple_strtoul(s, &e, 10); + if (s == e) + dbgp_num = 0; + } pr_notice("dbgp_num: %lu\n", dbgp_num); |