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staging: vchiq_arm: handle error case of get_user_pages

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It's possible that get_user_pages() could fail. So evaluate its
return code and handle this error case properly.

This issue has been found by Cppcheck.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Wahren
2016-10-31 14:39:31 +00:00
committed by Greg Kroah-Hartman
parent 6d5f49a9f6
commit 0feb1ed5c5
1 changed files with 8 additions and 0 deletions
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8
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
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@@ -1579,6 +1579,12 @@ dump_phys_mem(void *virt_addr, uint32_t num_bytes)
prev_idx = -1;
page = NULL;
if (rc < 0) {
vchiq_log_error(vchiq_arm_log_level,
"Failed to get user pages: %d\n", rc);
goto out;
}
while (offset < end_offset) {
int page_offset = offset % PAGE_SIZE;
@@ -1602,6 +1608,8 @@ dump_phys_mem(void *virt_addr, uint32_t num_bytes)
offset += 16;
}
out:
if (page != NULL)
kunmap(page);