Out of the three callers once insists on the scratch buffer, and the
others are fine with a new allocation. Switch those two to juse use
pci_alloc_consistent directly, and open code the scratch buffer
allocation in the remaining one. This avoids a case where we might
be doing a memory allocation under a spinlock with irqs disabled.
Signed-off-by: Christoph Hellwig
---
drivers/scsi/gdth.c | 7 ++--
drivers/scsi/gdth_proc.c | 71
drivers/scsi/gdth_proc.h | 3 --
3 files changed, 25 insertions(+), 56 deletions(-)
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 45e67d4cb3af..7174e7a88da2 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -4232,7 +4232,7 @@ static int ioc_general(void __user *arg, char *cmnd)
gdth_ioctl_general gen;
gdth_ha_str *ha;
char *buf = NULL;
- u64 paddr;
+ dma_addr_t paddr;
int rval;
if (copy_from_user(, arg, sizeof(gdth_ioctl_general)))
@@ -4251,7 +4251,8 @@ static int ioc_general(void __user *arg, char *cmnd)
if (gen.data_len + gen.sense_len == 0)
goto execute;
- buf = gdth_ioctl_alloc(ha, gen.data_len + gen.sense_len, FALSE, );
+buf = pci_alloc_consistent(ha->pdev, gen.data_len + gen.sense_len,
+ );
if (!buf)
return -EFAULT;
@@ -4286,7 +4287,7 @@ static int ioc_general(void __user *arg, char *cmnd)
rval = 0;
out_free_buf:
- gdth_ioctl_free(ha, gen.data_len+gen.sense_len, buf, paddr);
+ pci_free_consistent(ha->pdev, gen.data_len + gen.sense_len, buf, paddr);
return rval;
}
diff --git a/drivers/scsi/gdth_proc.c b/drivers/scsi/gdth_proc.c
index bd5532a80b0e..8e77f8fd8641 100644
--- a/drivers/scsi/gdth_proc.c
+++ b/drivers/scsi/gdth_proc.c
@@ -31,7 +31,6 @@ static int gdth_set_asc_info(struct Scsi_Host *host, char
*buffer,
int i, found;
gdth_cmd_strgdtcmd;
gdth_cpar_str *pcpar;
-u64 paddr;
charcmnd[MAX_COMMAND_SIZE];
memset(cmnd, 0xff, 12);
@@ -113,13 +112,23 @@ static int gdth_set_asc_info(struct Scsi_Host *host, char
*buffer,
}
if (wb_mode) {
-if (!gdth_ioctl_alloc(ha, sizeof(gdth_cpar_str), TRUE, ))
-return(-EBUSY);
+ unsigned long flags;
+
+ BUILD_BUG_ON(sizeof(gdth_cpar_str) > GDTH_SCRATCH);
+
+ spin_lock_irqsave(>smp_lock, flags);
+ if (ha->scratch_busy) {
+ spin_unlock_irqrestore(>smp_lock, flags);
+return -EBUSY;
+ }
+ ha->scratch_busy = TRUE;
+ spin_unlock_irqrestore(>smp_lock, flags);
+
pcpar = (gdth_cpar_str *)ha->pscratch;
memcpy( pcpar, >cpar, sizeof(gdth_cpar_str) );
gdtcmd.Service = CACHESERVICE;
gdtcmd.OpCode = GDT_IOCTL;
-gdtcmd.u.ioctl.p_param = paddr;
+gdtcmd.u.ioctl.p_param = ha->scratch_phys;
gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
@@ -127,7 +136,10 @@ static int gdth_set_asc_info(struct Scsi_Host *host, char
*buffer,
gdth_execute(host, , cmnd, 30, NULL);
-gdth_ioctl_free(ha, GDTH_SCRATCH, ha->pscratch, paddr);
+ spin_lock_irqsave(>smp_lock, flags);
+ ha->scratch_busy = FALSE;
+ spin_unlock_irqrestore(>smp_lock, flags);
+
printk("Done.\n");
return(orig_length);
}
@@ -143,7 +155,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host
*host)
int id, i, j, k, sec, flag;
int no_mdrv = 0, drv_no, is_mirr;
u32 cnt;
-u64 paddr;
+dma_addr_t paddr;
int rc = -ENOMEM;
gdth_cmd_str *gdtcmd;
@@ -232,7 +244,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host
*host)
seq_puts(m, "\nPhysical Devices:");
flag = FALSE;
-buf = gdth_ioctl_alloc(ha, size, FALSE, );
+buf = pci_alloc_consistent(ha->pdev, size, );
if (!buf)
goto stop_output;
for (i = 0; i < ha->bus_cnt; ++i) {
@@ -406,7 +418,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host
*host)
seq_printf(m,
" To Array Drv.:\t%s\n", hrec);
}
-
+
if (!flag)
seq_puts(m, "\n --\n");
@@ -500,7 +512,7 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host
*host)
}
}
}
-gdth_ioctl_free(ha, size, buf, paddr);
+ pci_free_consistent(ha->pdev, size, buf, paddr);
for (i = 0; i < MAX_HDRIVES; ++i) {
if (!(ha->hdr[i].present))
@@ -553,47 +565,6 @@ int gdth_show_info(struct seq_file *m, struct Scsi_Host
*host)
return rc;
}
-static char *gdth_ioctl_alloc(gdth_ha_str *ha, int size, int scratch,
- u64 *paddr)
-{
-unsigned long flags;
-char *ret_val;
-
-if (size ==
