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| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2017-01-16 12:14:52 +0530 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2017-01-16 11:09:22 +0100 |
| commit | f5c61277f67f03df334c4486397ecff54968971b (patch) | |
| tree | e9b494099de12ae0e23eefa0013dcad3fe66eb3e /drivers/edac | |
| parent | eca90a3b3226fcecb4b3bbf4b0b6ff72422674bc (diff) | |
| download | linux-f5c61277f67f03df334c4486397ecff54968971b.tar.bz2 | |
EDAC, i82975x: Add ioremap_nocache() error handling
If ioremap_nocache() fails, it will return NULL. Which will then cause a
NULL-pointer dereference. Handle the returned value properly.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1484549092-11349-1-git-send-email-arvind.yadav.cs@gmail.com
[ Boris: massage commit message and improve error message. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/i82975x_edac.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/edac/i82975x_edac.c b/drivers/edac/i82975x_edac.c index 7baa8ace267b..9dcdab28f665 100644 --- a/drivers/edac/i82975x_edac.c +++ b/drivers/edac/i82975x_edac.c @@ -494,6 +494,10 @@ static int i82975x_probe1(struct pci_dev *pdev, int dev_idx) } mchbar &= 0xffffc000; /* bits 31:14 used for 16K window */ mch_window = ioremap_nocache(mchbar, 0x1000); + if (!mch_window) { + edac_dbg(3, "error ioremapping MCHBAR!\n"); + goto fail0; + } #ifdef i82975x_DEBUG_IOMEM i82975x_printk(KERN_INFO, "MCHBAR real = %0x, remapped = %p\n", |