On 03/01/2014 04:35 AM, Dan Carpenter wrote:
Hello Micky Ching,
The patch c42deffd5b53: "mmc: rtsx: add support for pre_req and
post_req" from Feb 17, 2014, leads to the following static checker
warning:
drivers/mmc/host/rtsx_pci_sdmmc.c:525 sd_pre_dma_transfer()
warn: we tested 'next' before and it was 'false'
drivers/mmc/host/rtsx_pci_sdmmc.c
520 "error: invalid cookie data[%d] host[%d]\n",
521 data->host_cookie, host->next_data.cookie);
522 data->host_cookie = 0;
523 }
524
525 if (next || (!next && data->host_cookie !=
host->next_data.cookie))
^^^^^
We are testing "next" twice. Often that means the intention was to test
a different variable?
Yes, it can be write as follow.
if (next || data->host_cookie != host->next_data.cookie)
526 sg_count = rtsx_pci_dma_map_sg(pcr,
527 data->sg, data->sg_len, read);
528 else
529 sg_count = host->next_data.sg_count;
regards,
dan carpenter
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