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scsi: gdth: reuse dma coherent allocation in gdth_show_info

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gdth_show_info currently allocs and frees a dma buffer four times which
isn't very efficient. Reuse a single allocation instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2018-12-12 08:41:19 +01:00 committed by Martin K. Petersen
parent 9f475ebff8
commit 8d22022c3a
1 changed files with 5 additions and 15 deletions
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20
drivers/scsi/gdth_proc.c
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@ -226,11 +226,13 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
#endif
if (ha->more_proc) {
size_t size = max_t(size_t, GDTH_SCRATCH, sizeof(gdth_hget_str));
/* more information: 2. about physical devices */
seq_puts(m, "\nPhysical Devices:");
flag = FALSE;
buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
buf = gdth_ioctl_alloc(ha, size, FALSE, &paddr);
if (!buf)
goto stop_output;
for (i = 0; i < ha->bus_cnt; ++i) {
@ -323,7 +325,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
}
}
}
gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
if (!flag)
seq_puts(m, "\n --\n");
@ -332,9 +333,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
seq_puts(m, "\nLogical Drives:");
flag = FALSE;
buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
if (!buf)
goto stop_output;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!ha->hdr[i].is_logdrv)
continue;
@ -408,7 +406,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
seq_printf(m,
" To Array Drv.:\t%s\n", hrec);
}
gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
if (!flag)
seq_puts(m, "\n --\n");
@ -417,9 +414,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
seq_puts(m, "\nArray Drives:");
flag = FALSE;
buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
if (!buf)
goto stop_output;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!(ha->hdr[i].is_arraydrv && ha->hdr[i].is_master))
continue;
@ -468,8 +462,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
hrec);
}
}
gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
if (!flag)
seq_puts(m, "\n --\n");
@ -477,9 +470,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
seq_puts(m, "\nHost Drives:");
flag = FALSE;
buf = gdth_ioctl_alloc(ha, sizeof(gdth_hget_str), FALSE, &paddr);
if (!buf)
goto stop_output;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!ha->hdr[i].is_logdrv ||
(ha->hdr[i].is_arraydrv && !ha->hdr[i].is_master))
@ -510,7 +500,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
}
}
}
gdth_ioctl_free(ha, sizeof(gdth_hget_str), buf, paddr);
gdth_ioctl_free(ha, size, buf, paddr);
for (i = 0; i < MAX_HDRIVES; ++i) {
if (!(ha->hdr[i].present))