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arcmsr: fix ioctl data read/write error for adapter type C

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Rewrite ioctl entry and its relate function.  This patch fix ioctl data
read/write error and change data I/O access from byte to Dword.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
这个提交包含在：
Ching Huang
2014-08-19 15:17:45 +08:00
提交者 Christoph Hellwig
父节点 6e38adfc58
当前提交 bb263c4ecb
共修改 3 个文件，包含 444 行新增和 241 行删除
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101
drivers/scsi/arcmsr/arcmsr_attr.c
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@@ -70,40 +70,75 @@ static ssize_t arcmsr_sysfs_iop_message_read(struct file *filp,
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
uint8_t *pQbuffer,*ptmpQbuffer;
int32_t allxfer_len = 0;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
/* do message unit read. */
ptmpQbuffer = (uint8_t *)buf;
while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
&& (allxfer_len < 1031)) {
spin_lock_irqsave(&acb->rqbuffer_lock, flags);
if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
memcpy(ptmpQbuffer, pQbuffer, 1);
acb->rqbuf_firstindex++;
acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
ptmpQbuffer++;
allxfer_len++;
if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
if ((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex) >= 1032) {
memcpy(ptmpQbuffer, pQbuffer, 1032);
acb->rqbuf_firstindex += 1032;
acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
allxfer_len = 1032;
} else {
if (((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)
+ acb->rqbuf_lastindex) > 1032) {
memcpy(ptmpQbuffer, pQbuffer,
ARCMSR_MAX_QBUFFER
- acb->rqbuf_firstindex);
ptmpQbuffer += ARCMSR_MAX_QBUFFER
- acb->rqbuf_firstindex;
memcpy(ptmpQbuffer, acb->rqbuffer, 1032
- (ARCMSR_MAX_QBUFFER -
acb->rqbuf_firstindex));
acb->rqbuf_firstindex = 1032 -
(ARCMSR_MAX_QBUFFER -
acb->rqbuf_firstindex);
allxfer_len = 1032;
} else {
memcpy(ptmpQbuffer, pQbuffer,
ARCMSR_MAX_QBUFFER -
acb->rqbuf_firstindex);
ptmpQbuffer += ARCMSR_MAX_QBUFFER -
acb->rqbuf_firstindex;
memcpy(ptmpQbuffer, acb->rqbuffer,
acb->rqbuf_lastindex);
allxfer_len = ARCMSR_MAX_QBUFFER -
acb->rqbuf_firstindex +
acb->rqbuf_lastindex;
acb->rqbuf_firstindex =
acb->rqbuf_lastindex;
}
}
} else {
if ((acb->rqbuf_lastindex - acb->rqbuf_firstindex) > 1032) {
memcpy(ptmpQbuffer, pQbuffer, 1032);
acb->rqbuf_firstindex += 1032;
allxfer_len = 1032;
} else {
memcpy(ptmpQbuffer, pQbuffer, acb->rqbuf_lastindex
- acb->rqbuf_firstindex);
allxfer_len = acb->rqbuf_lastindex -
acb->rqbuf_firstindex;
acb->rqbuf_firstindex = acb->rqbuf_lastindex;
}
}
}
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
struct QBUFFER __iomem *prbuffer;
uint8_t __iomem *iop_data;
int32_t iop_len;
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
prbuffer = arcmsr_get_iop_rqbuffer(acb);
iop_data = prbuffer->data;
iop_len = readl(&prbuffer->data_len);
while (iop_len > 0) {
acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
acb->rqbuf_lastindex++;
acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
iop_data++;
iop_len--;
}
arcmsr_iop_message_read(acb);
if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
}
return (allxfer_len);
spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
return allxfer_len;
}
static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
@@ -117,6 +152,7 @@ static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
uint8_t *pQbuffer, *ptmpuserbuffer;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@@ -125,18 +161,19 @@ static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
/* do message unit write. */
ptmpuserbuffer = (uint8_t *)buf;
user_len = (int32_t)count;
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
wqbuf_lastindex = acb->wqbuf_lastindex;
wqbuf_firstindex = acb->wqbuf_firstindex;
if (wqbuf_lastindex != wqbuf_firstindex) {
arcmsr_post_ioctldata2iop(acb);
arcmsr_write_ioctldata2iop(acb);
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
return 0; /*need retry*/
} else {
my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
&(ARCMSR_MAX_QBUFFER - 1);
&(ARCMSR_MAX_QBUFFER - 1);
if (my_empty_len >= user_len) {
while (user_len > 0) {
pQbuffer =
&acb->wqbuffer[acb->wqbuf_lastindex];
pQbuffer = &acb->wqbuffer[acb->wqbuf_lastindex];
memcpy(pQbuffer, ptmpuserbuffer, 1);
acb->wqbuf_lastindex++;
acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
@@ -146,10 +183,12 @@ static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
acb->acb_flags &=
~ACB_F_MESSAGE_WQBUFFER_CLEARED;
arcmsr_post_ioctldata2iop(acb);
arcmsr_write_ioctldata2iop(acb);
}
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
return count;
} else {
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
return 0; /*need retry*/
}
}
@@ -165,22 +204,24 @@ static ssize_t arcmsr_sysfs_iop_message_clear(struct file *filp,
struct Scsi_Host *host = class_to_shost(dev);
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
uint8_t *pQbuffer;
unsigned long flags;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
arcmsr_iop_message_read(acb);
}
arcmsr_clear_iop2drv_rqueue_buffer(acb);
acb->acb_flags |=
(ACB_F_MESSAGE_WQBUFFER_CLEARED
| ACB_F_MESSAGE_RQBUFFER_CLEARED
| ACB_F_MESSAGE_WQBUFFER_READED);
spin_lock_irqsave(&acb->rqbuffer_lock, flags);
acb->rqbuf_firstindex = 0;
acb->rqbuf_lastindex = 0;
spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
acb->wqbuf_firstindex = 0;
acb->wqbuf_lastindex = 0;
spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
pQbuffer = acb->rqbuffer;
memset(pQbuffer, 0, sizeof (struct QBUFFER));
pQbuffer = acb->wqbuffer;