diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-02-11 16:09:40 +0300 |
|---|---|---|
| committer | Darren Hart (VMware) <dvhart@infradead.org> | 2019-02-23 20:20:56 +0300 |
| commit | f27e1d1826d0392c0841e6f098b88e2da166163a (patch) | |
| tree | 28216a2ad5c1889a5ffd4f4e4a92c7405c8eb3a5 /drivers/platform | |
| parent | b75318597391f22421809b0749ccb8aba80140c2 (diff) | |
| download | linux-f27e1d1826d0392c0841e6f098b88e2da166163a.tar.xz | |
platform/x86: dell_rbu: fix lock imbalance in img_update_realloc
We need to ensure rbu_data.lock is always held on return.
Fixes: 289790a3ea94 ("platform/x86: dell_rbu: stop abusing the DMA API")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/dell_rbu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/dell_rbu.c b/drivers/platform/x86/dell_rbu.c index 8104ca0c44ca..031c68903583 100644 --- a/drivers/platform/x86/dell_rbu.c +++ b/drivers/platform/x86/dell_rbu.c @@ -436,6 +436,7 @@ static int img_update_realloc(unsigned long size) ordernum = get_order(size); image_update_buffer = (unsigned char *)__get_free_pages(GFP_DMA32, ordernum); + spin_lock(&rbu_data.lock); if (!image_update_buffer) { pr_debug("Not enough memory for image update:" "size = %ld\n", size); @@ -446,7 +447,6 @@ static int img_update_realloc(unsigned long size) if (WARN_ON_ONCE(img_buf_phys_addr > BIOS_SCAN_LIMIT)) return -EINVAL; /* can't happen per definition */ - spin_lock(&rbu_data.lock); rbu_data.image_update_buffer = image_update_buffer; rbu_data.image_update_buffer_size = size; rbu_data.bios_image_size = rbu_data.image_update_buffer_size; |