scsi: nsp_cs: Check of ioremap return value

Since it is possible for ioremap() to fail, 'data->MmioAddress' could be
NULL. Skip entry if ioremap() fails.

Link: https://lore.kernel.org/r/20211230021137.1823352-1-jiasheng@iscas.ac.cn
Fixes: 0e6f9d270840 ("pcmcia: use pcmcia_loop_config in scsi pcmcia drivers")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
index 8b9e889..92c818a 100644 (file)
--- a/drivers/scsi/pcmcia/nsp_cs.c
+++ b/drivers/scsi/pcmcia/nsp_cs.c
@@ -1557,6 +1557,9 @@ static int nsp_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
                data->MmioAddress = (unsigned long)
                        ioremap(p_dev->resource[2]->start,
                                        resource_size(p_dev->resource[2]));
+               if (!data->MmioAddress)
+                       goto next_entry;
+
                data->MmioLength  = resource_size(p_dev->resource[2]);
        }
        /* If we got this far, we're cool! */