iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: message: fusion: mptctl: Use dma_alloc_coherent()

Browse Source 
In [1], Christoph Hellwig has proposed to remove the wrappers in
include/linux/pci-dma-compat.h.

Some reasons why this API should be removed have been given by Julia
Lawall in [2].

When memory is allocated in kbuf_alloc_2_sgl() GFP_KERNEL can be used
because this function already uses the GFP_USER flag for some memory
allocation and not spin_lock is taken in the between.

When memory is allocated in mptctl_do_mpt_command() GFP_KERNEL can be used
because this function already uses copy_from_user() and this function can
sleep.

When memory is allocated in mptctl_hp_hostinfo() GFP_KERNEL can be used
because this function already uses mpt_config() and this function has an
explicit might_sleep().

When memory is allocated in mptctl_hp_targetinfo() GFP_KERNEL can be used
because this function already uses mpt_config() and this function has an
explicit might_sleep().

[1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/
[2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/

Link: https://lore.kernel.org/r/516375d6d06114484533baf03aae351306100246.1641500561.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christophe JAILLET 2022-01-06 22:54:39 +01:00 committed by Martin K. Petersen
parent 76a334d756
commit 706dc3b919
1 changed files with 19 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/message/fusion/mptctl.c
View File

@ -1041,7 +1041,8 @@ kbuf_alloc_2_sgl(int bytes, u32 sgdir, int sge_offset, int *frags,
* copying the data in this array into the correct place in the
* request and chain buffers.
*/
sglbuf = pci_alloc_consistent(ioc->pcidev, MAX_SGL_BYTES, sglbuf_dma);
sglbuf = dma_alloc_coherent(&ioc->pcidev->dev, MAX_SGL_BYTES,
sglbuf_dma, GFP_KERNEL);
if (sglbuf == NULL)
goto free_and_fail;
@ -1062,9 +1063,9 @@ kbuf_alloc_2_sgl(int bytes, u32 sgdir, int sge_offset, int *frags,
while (bytes_allocd < bytes) {
this_alloc = min(alloc_sz, bytes-bytes_allocd);
buflist[buflist_ent].len = this_alloc;
buflist[buflist_ent].kptr = pci_alloc_consistent(ioc->pcidev,
this_alloc,
&pa);
buflist[buflist_ent].kptr = dma_alloc_coherent(&ioc->pcidev->dev,
this_alloc,
&pa, GFP_KERNEL);
if (buflist[buflist_ent].kptr == NULL) {
alloc_sz = alloc_sz / 2;
if (alloc_sz == 0) {
@ -2105,8 +2106,9 @@ mptctl_do_mpt_command (MPT_ADAPTER *ioc, struct mpt_ioctl_command karg, void __u
}
flagsLength |= karg.dataOutSize;
bufOut.len = karg.dataOutSize;
bufOut.kptr = pci_alloc_consistent(
ioc->pcidev, bufOut.len, &dma_addr_out);
bufOut.kptr = dma_alloc_coherent(&ioc->pcidev->dev,
bufOut.len,
&dma_addr_out, GFP_KERNEL);
if (bufOut.kptr == NULL) {
rc = -ENOMEM;
@ -2139,8 +2141,9 @@ mptctl_do_mpt_command (MPT_ADAPTER *ioc, struct mpt_ioctl_command karg, void __u
flagsLength |= karg.dataInSize;
bufIn.len = karg.dataInSize;
bufIn.kptr = pci_alloc_consistent(ioc->pcidev,
bufIn.len, &dma_addr_in);
bufIn.kptr = dma_alloc_coherent(&ioc->pcidev->dev,
bufIn.len,
&dma_addr_in, GFP_KERNEL);
if (bufIn.kptr == NULL) {
rc = -ENOMEM;
@ -2400,7 +2403,9 @@ mptctl_hp_hostinfo(MPT_ADAPTER *ioc, unsigned long arg, unsigned int data_size)
/* Issue the second config page request */
cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
pbuf = pci_alloc_consistent(ioc->pcidev, hdr.PageLength * 4, &buf_dma);
pbuf = dma_alloc_coherent(&ioc->pcidev->dev,
hdr.PageLength * 4,
&buf_dma, GFP_KERNEL);
if (pbuf) {
cfg.physAddr = buf_dma;
if (mpt_config(ioc, &cfg) == 0) {
@ -2477,7 +2482,7 @@ mptctl_hp_hostinfo(MPT_ADAPTER *ioc, unsigned long arg, unsigned int data_size)
else
IstwiRWRequest->DeviceAddr = 0xB0;
pbuf = pci_alloc_consistent(ioc->pcidev, 4, &buf_dma);
pbuf = dma_alloc_coherent(&ioc->pcidev->dev, 4, &buf_dma, GFP_KERNEL);
if (!pbuf)
goto out;
ioc->add_sge((char *)&IstwiRWRequest->SGL,
@ -2592,7 +2597,8 @@ mptctl_hp_targetinfo(MPT_ADAPTER *ioc, unsigned long arg)
/* Get the data transfer speeds
*/
data_sz = ioc->spi_data.sdp0length * 4;
pg0_alloc = pci_alloc_consistent(ioc->pcidev, data_sz, &page_dma);
pg0_alloc = dma_alloc_coherent(&ioc->pcidev->dev, data_sz, &page_dma,
GFP_KERNEL);
if (pg0_alloc) {
hdr.PageVersion = ioc->spi_data.sdp0version;
hdr.PageLength = data_sz;
@ -2657,7 +2663,8 @@ mptctl_hp_targetinfo(MPT_ADAPTER *ioc, unsigned long arg)
/* Issue the second config page request */
cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
data_sz = (int) cfg.cfghdr.hdr->PageLength * 4;
pg3_alloc = pci_alloc_consistent(ioc->pcidev, data_sz, &page_dma);
pg3_alloc = dma_alloc_coherent(&ioc->pcidev->dev, data_sz,
&page_dma, GFP_KERNEL);
if (pg3_alloc) {
cfg.physAddr = page_dma;
cfg.pageAddr = (karg.hdr.channel << 8) | karg.hdr.id;