On 7/27/20 2:18 PM, Arnd Bergmann wrote: > On Sun, Jul 26, 2020 at 9:15 PM Samuel Holland <samuel@xxxxxxxxxxxx> wrote: >> >> The main issue observed was at the call to scsi_set_resid, where the >> byteswapped parameter would eventually trigger the alignment check at >> drivers/scsi/sd.c:2009. At that point, the kernel would continuously >> complain about an "Unaligned partial completion", and no further I/O >> could occur. >> >> This gets the controller working on big endian powerpc64. >> >> Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx> >> --- >> drivers/scsi/3w-9xxx.c | 35 +++++++++++++++++------------------ >> drivers/scsi/3w-9xxx.h | 6 +++++- >> 2 files changed, 22 insertions(+), 19 deletions(-) >> >> diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c >> index 3337b1e80412..95e25fda1f90 100644 >> --- a/drivers/scsi/3w-9xxx.c >> +++ b/drivers/scsi/3w-9xxx.c >> @@ -303,10 +303,10 @@ static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset) >> >> /* Initialize sglist */ >> memset(&sglist, 0, sizeof(TW_SG_Entry)); >> - sglist[0].length = TW_SECTOR_SIZE; >> - sglist[0].address = tw_dev->generic_buffer_phys[request_id]; >> + sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE); >> + sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]); > > This looks like it would add a sparse warning, not fix one, unless you also > change the types of the target structure. Yes, I meant to change the structure types as well. All of the command structures sent to the card are little-endian. I pulled this bugfix patch out of a series of unrelated changes, and I missed the header changes. I'll send a v2. >> @@ -501,7 +501,7 @@ static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id) >> Sunday 12:00AM */ >> local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60)); >> div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime); >> - schedulertime = cpu_to_le32(schedulertime % 604800); >> + cpu_to_le32p(&schedulertime); >> >> memcpy(param->data, &schedulertime, sizeof(u32)); > > You dropped the '%' operation, and the result of the byteswap? schedulertime is the remainder from the previous line, so it is <604800 already. You're right about that being the wrong function -- I meant to use cpu_to_le32s to swap it in place, to avoid needing a second variable. >> @@ -1004,7 +1004,7 @@ static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_ >> full_command_packet->header.status_block.error, >> error_str[0] == '\0' ? >> twa_string_lookup(twa_error_table, >> - full_command_packet->header.status_block.error) : error_str, >> + le16_to_cpu(full_command_packet->header.status_block.error)) : error_str, >> full_command_packet->header.err_specific_desc); >> else > > This looks correct, but the error value has already been copied into the local > 'error' variable, which you could use for simplification. As 'status_block' is > defined as a native_endian structure, this also introduced a sparse warning. I'll use 'error' in v2, thanks for the hint. >> @@ -1012,7 +1012,7 @@ static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_ >> full_command_packet->header.status_block.error, >> error_str[0] == '\0' ? >> twa_string_lookup(twa_error_table, >> - full_command_packet->header.status_block.error) : error_str, >> + le16_to_cpu(full_command_packet->header.status_block.error)) : error_str, > > Same here > > Arnd > Cheers, Samuel
