Currently, count value is not correct more than len=8193 like below.
len Current-cnt New-cnt Anticipated-cnt
4095 1 1 1
4096 1 1 1
4097 2 2 2
8191 2 2 2
8192 2 2 2
8193 2(NG) 3 3
12287 3 3 3
12288 3 3 3
12289 3(NG) 4 4
This patch fixes the issue.
Signed-off-by: Tomoya MORINAGA <tomoya.r...@gmail.com>
---
drivers/spi/spi-topcliff-pch.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 9fb0541..08b5f31 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1247,7 +1247,9 @@ static void pch_spi_process_messages(struct work_struct
*pwork)
}
spin_unlock(&data->lock);
- cnt = data->cur_trans->len / (PCH_BUF_SIZE + 1) + 1;
+ if (!data->cur_trans->len)
+ goto out;
+ cnt = (data->cur_trans->len - 1) / PCH_BUF_SIZE + 1;
data->save_total_len = data->cur_trans->len;
if (data->use_dma) {
int i;
--
1.7.4.4
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