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driver core: platform: fix u32 greater or equal to zero comparison

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Currently the check that a u32 variable i is >= 0 is always true because
the unsigned variable will never be negative, causing the loop to run
forever.  Fix this by changing the pre-decrement check to a zero check on
i followed by a decrement of i.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: 39cc539f90 ("driver core: platform: Prevent resouce overflow from causing infinite loops")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20200116175758.88396-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2020-01-16 17:57:58 +00:00 committed by Greg Kroah-Hartman
parent f3c1948182
commit 0707cfa5c3
1 changed files with 1 additions and 1 deletions
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2
drivers/base/platform.c
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@ -571,7 +571,7 @@ int platform_device_add(struct platform_device *pdev)
pdev->id = PLATFORM_DEVID_AUTO;
}
while (--i >= 0) {
while (i--) {
struct resource *r = &pdev->resource[i];
if (r->parent)
release_resource(r);