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Subject[patch 46/76] arcmsr: fix IRQs disabled warning spew
-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Mike Pagano <mpagano@gentoo.org>

As of 2.6.24, running the archttp passthrough daemon with the arcmsr
driver produces an endless spew of dma_free_coherent warnings:

WARNING: at arch/x86/kernel/pci-dma_64.c:169 dma_free_coherent()

It turns out that coherent memory is not needed, so commit 76d78300 by
Nick Cheng <nick.cheng@areca.com.tw> switched it to kmalloc (as well as
making a lot of other changes which have not been included here).

James Bottomley pointed out that the new kmalloc usage was also wrong,
I corrected this in commit 69e562c2.

This patch combines both of the above for the purpose of fixing 2.6.24.
details in http://bugs.gentoo.org/208493.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Cc: Nick Cheng <nick.cheng@areca.com.tw>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/scsi/arcmsr/arcmsr_hba.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)

--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -1380,17 +1380,16 @@ static int arcmsr_iop_message_xfer(struc
switch(controlcode) {

case ARCMSR_MESSAGE_READ_RQBUFFER: {
- unsigned long *ver_addr;
- dma_addr_t buf_handle;
+ unsigned char *ver_addr;
uint8_t *pQbuffer, *ptmpQbuffer;
int32_t allxfer_len = 0;

- ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
+ ver_addr = kmalloc(1032, GFP_ATOMIC);
if (!ver_addr) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
- ptmpQbuffer = (uint8_t *) ver_addr;
+ ptmpQbuffer = ver_addr;
while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
&& (allxfer_len < 1031)) {
pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
@@ -1419,25 +1418,24 @@ static int arcmsr_iop_message_xfer(struc
}
arcmsr_iop_message_read(acb);
}
- memcpy(pcmdmessagefld->messagedatabuffer, (uint8_t *)ver_addr, allxfer_len);
+ memcpy(pcmdmessagefld->messagedatabuffer, ver_addr, allxfer_len);
pcmdmessagefld->cmdmessage.Length = allxfer_len;
pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
- pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
+ kfree(ver_addr);
}
break;

case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
- unsigned long *ver_addr;
- dma_addr_t buf_handle;
+ unsigned char *ver_addr;
int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
uint8_t *pQbuffer, *ptmpuserbuffer;

- ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
+ ver_addr = kmalloc(1032, GFP_ATOMIC);
if (!ver_addr) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
- ptmpuserbuffer = (uint8_t *)ver_addr;
+ ptmpuserbuffer = ver_addr;
user_len = pcmdmessagefld->cmdmessage.Length;
memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
wqbuf_lastindex = acb->wqbuf_lastindex;
@@ -1483,7 +1481,7 @@ static int arcmsr_iop_message_xfer(struc
retvalue = ARCMSR_MESSAGE_FAIL;
}
}
- pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
+ kfree(ver_addr);
}
break;

--


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