For SD cardreaders it's extremely common not to find cache on disk. The following error messages are thus very common and don't point to a real error one could try to fix but rather describe how the disk works: sd 0:0:0:0: [sda] No Caching mode page found sd 0:0:0:0: [sda] Assuming drive cache: write through Print these messages as warnings instead of errors. Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxx> --- hi Bart and all who it may concern, I only resending the same patch I sent in January before: https://lore.kernel.org/linux-scsi/20210122083000.32598-1-martin.kepplinger@xxxxxxx/ I like it more when messages printed as errors point to real problems that need fixing. thanks, martin drivers/scsi/sd.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a646d27df681..33ea36b41136 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2793,7 +2793,8 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) } } - sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); + sd_first_printk(KERN_WARNING, sdkp, + "No Caching mode page found\n"); goto defaults; Page_found: @@ -2848,7 +2849,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) "Assuming drive cache: write back\n"); sdkp->WCE = 1; } else { - sd_first_printk(KERN_ERR, sdkp, + sd_first_printk(KERN_WARNING, sdkp, "Assuming drive cache: write through\n"); sdkp->WCE = 0; } -- 2.30.2
