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Ming Lei authored
Commit 429120f3 starts to take account of segment's start dma address when computing max segment size, and data type of 'unsigned long' is used to do that. However, the segment mask may be 0xffffffff, so the figured out segment size may be overflowed in case of zero physical address on 32bit arch. Fix the issue by returning queue_max_segment_size() directly when that happens. Fixes: 429120f3 ("block: fix splitting segments on boundary masks") Reported-by:
Guenter Roeck <linux@roeck-us.net> Tested-by:
Guenter Roeck <linux@roeck-us.net> Cc: Christoph Hellwig <hch@lst.de> Tested-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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