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scsi: pm80xx: Fix driver fatal dump failure 

The function pm80xx_get_fatal_dump() has two issues that result in the
fatal dump not being able to complete successfully.

 1. Trying to collect fatal_logs from the application fails because we are
    not shifting the MEMBASE-II register properly. Once we read 64K region
    of data we have to shift the MEMBASE-II register and read the next
    chunk. Only then would we be able to get complete data.

 2. If a timeout occurs, our application will get stuck.

Link: https://lore.kernel.org/r/20210109123849.17098-6-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Viswas G 2021-01-09 18:08:46 +05:30 committed by Martin K. Petersen
parent 5d28026891
commit ec2e7e1aff
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/scsi/pm8001/pm80xx_hwi.c
View File

@ -349,10 +349,15 @@ moreData:
sprintf(
pm8001_ha->forensic_info.data_buf.direct_data,
"%08x ", 0xFFFFFFFF);
pm8001_cw32(pm8001_ha, 0,
return((char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf);
}
/* reset fatal_forensic_shift_offset back to zero and reset MEMBASE 2 register to zero */
pm8001_ha->fatal_forensic_shift_offset = 0; /* location in 64k region */
pm8001_cw32(pm8001_ha, 0,
MEMBASE_II_SHIFT_REGISTER,
pm8001_ha->fatal_forensic_shift_offset);
}
}
/* Read the next block of the debug data.*/
length_to_read = pm8001_mr32(fatal_table_address,
MPI_FATAL_EDUMP_TABLE_ACCUM_LEN) -
@ -373,13 +378,12 @@ moreData:
= 0;
pm8001_ha->forensic_info.data_buf.read_len = 0;
}
}
}
offset = (int)((char *)pm8001_ha->forensic_info.data_buf.direct_data
- (char *)buf);
pm8001_dbg(pm8001_ha, IO, "get_fatal_spcv: return4 0x%x\n", offset);
return (char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf;
return ((char *)pm8001_ha->forensic_info.data_buf.direct_data -
(char *)buf);
}
/* pm80xx_get_non_fatal_dump - dump the nonfatal data from the dma