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usb: storage: Fix overwritten in usb_stor_set_max_xfer_blk()

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The stored 'blk' value is overwritten to 'size / 512' before it can
be used in usb_stor_set_max_xfer_blk(). This is not what we want.
In fact, when 'size' exceeds the upper limit (USHRT_MAX * 512), we
should simply assign 'size' to the upper limit.

Reported-by: Coverity (CID: 167250)
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Bin Meng 2017-09-27 21:50:07 -07:00 committed by Marek Vasut
parent fae35857e1
commit 72ac8f3fc2
1 changed files with 1 additions and 1 deletions
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2
common/usb_storage.c
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@ -964,7 +964,7 @@ static void usb_stor_set_max_xfer_blk(struct usb_device *udev,
blk = 20;
} else {
if (size > USHRT_MAX * 512)
blk = USHRT_MAX;
size = USHRT_MAX * 512;
blk = size / 512;
}
#endif