diff options
| author | Frank Haverkamp <haver@linux.vnet.ibm.com> | 2014-09-10 16:37:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-23 23:15:47 -0700 |
| commit | 1451f414639465995dfc1f820aa1a64723cbd662 (patch) | |
| tree | d1983ab9e5d532368ad82261295a78c114fa8514 /drivers/misc/genwqe/card_dev.c | |
| parent | 08e4906cc29d092ae2da0ff089efe1488e584d3c (diff) | |
| download | linux-1451f414639465995dfc1f820aa1a64723cbd662.tar.bz2 | |
GenWQE: Support blocking when DDCB queue is busy
When the GenWQE hardware queue was busy, the driver returned simply
-EBUSY. This caused polling by applications which increased the load
on the already busy system. This change implements the possiblity to
sleep on a waitqueue instead when the DDCB queue is busy. The
requestor is woken up when there is free space on the queue again.
The old way to get -EBUSY is still available if the device is openend
with O_NONBLOCKING. The default is now blocking behavior.
Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/genwqe/card_dev.c')
| -rw-r--r-- | drivers/misc/genwqe/card_dev.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c index 59e0081acc8f..5918586f2f76 100644 --- a/drivers/misc/genwqe/card_dev.c +++ b/drivers/misc/genwqe/card_dev.c @@ -516,6 +516,7 @@ static int do_flash_update(struct genwqe_file *cfile, u32 crc; u8 cmdopts; struct genwqe_dev *cd = cfile->cd; + struct file *filp = cfile->filp; struct pci_dev *pci_dev = cd->pci_dev; if ((load->size & 0x3) != 0) @@ -610,7 +611,7 @@ static int do_flash_update(struct genwqe_file *cfile, /* For Genwqe5 we get back the calculated CRC */ *(u64 *)&req->asv[0] = 0ULL; /* 0x80 */ - rc = __genwqe_execute_raw_ddcb(cd, req); + rc = __genwqe_execute_raw_ddcb(cd, req, filp->f_flags); load->retc = req->retc; load->attn = req->attn; @@ -650,6 +651,7 @@ static int do_flash_read(struct genwqe_file *cfile, u8 *xbuf; u8 cmdopts; struct genwqe_dev *cd = cfile->cd; + struct file *filp = cfile->filp; struct pci_dev *pci_dev = cd->pci_dev; struct genwqe_ddcb_cmd *cmd; @@ -727,7 +729,7 @@ static int do_flash_read(struct genwqe_file *cfile, /* we only get back the calculated CRC */ *(u64 *)&cmd->asv[0] = 0ULL; /* 0x80 */ - rc = __genwqe_execute_raw_ddcb(cd, cmd); + rc = __genwqe_execute_raw_ddcb(cd, cmd, filp->f_flags); load->retc = cmd->retc; load->attn = cmd->attn; @@ -988,13 +990,14 @@ static int genwqe_execute_ddcb(struct genwqe_file *cfile, { int rc; struct genwqe_dev *cd = cfile->cd; + struct file *filp = cfile->filp; struct ddcb_requ *req = container_of(cmd, struct ddcb_requ, cmd); rc = ddcb_cmd_fixups(cfile, req); if (rc != 0) return rc; - rc = __genwqe_execute_raw_ddcb(cd, cmd); + rc = __genwqe_execute_raw_ddcb(cd, cmd, filp->f_flags); ddcb_cmd_cleanup(cfile, req); return rc; } @@ -1006,6 +1009,7 @@ static int do_execute_ddcb(struct genwqe_file *cfile, struct genwqe_ddcb_cmd *cmd; struct ddcb_requ *req; struct genwqe_dev *cd = cfile->cd; + struct file *filp = cfile->filp; cmd = ddcb_requ_alloc(); if (cmd == NULL) @@ -1021,7 +1025,7 @@ static int do_execute_ddcb(struct genwqe_file *cfile, if (!raw) rc = genwqe_execute_ddcb(cfile, cmd); else - rc = __genwqe_execute_raw_ddcb(cd, cmd); + rc = __genwqe_execute_raw_ddcb(cd, cmd, filp->f_flags); /* Copy back only the modifed fields. Do not copy ASIV back since the copy got modified by the driver. */ |