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| author | Tomonori Sakita <tomonori.sakita@sord.co.jp> | 2019-01-25 05:02:22 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-27 21:39:07 +0300 |
| commit | 6571ebce112a21ec9be68ef2f53b96fcd41fd81b (patch) | |
| tree | 8347f592ace98ab4338dd84538c8acf049ddc206 /net | |
| parent | 63346650c1a94a92be61a57416ac88c0a47c4327 (diff) | |
| download | linux-6571ebce112a21ec9be68ef2f53b96fcd41fd81b.tar.xz | |
net: altera_tse: fix msgdma_tx_completion on non-zero fill_level case
If fill_level was not zero and status was not BUSY,
result of "tx_prod - tx_cons - inuse" might be zero.
Subtracting 1 unconditionally results invalid negative return value
on this case.
Make sure not to return an negative value.
Signed-off-by: Tomonori Sakita <tomonori.sakita@sord.co.jp>
Signed-off-by: Atsushi Nemoto <atsushi.nemoto@sord.co.jp>
Reviewed-by: Dalon L Westergreen <dalon.westergreen@linux.intel.com>
Acked-by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions