diff options
| author | John Gregor <john.gregor@qlogic.com> | 2007-09-05 01:57:14 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-01-25 14:15:27 -0800 |
| commit | e342c119172f87f2d812bccfd0283f62e1bc1c2a (patch) | |
| tree | 52eb0e75f5f894ab7f0f3c755f0876f18637e5a9 /drivers/infiniband/hw/ipath/ipath_init_chip.c | |
| parent | 9ab4295d1d9ab10a249aea002060685f935a528c (diff) | |
IB/ipath: Fix sendctrl locking
Code review pointed out that the locking around uses of ipath_sendctrl
and kr_sendctrl were, in several places, incorrect and/or inconsistent.
Signed-off-by: John Gregor <john.gregor@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_init_chip.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_init_chip.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c index 9e9d6fafcf0..1c65ab907a3 100644 --- a/drivers/infiniband/hw/ipath/ipath_init_chip.c +++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c @@ -345,7 +345,7 @@ static int init_chip_first(struct ipath_devdata *dd, dd->ipath_piobcnt2k, dd->ipath_pio2kbase); spin_lock_init(&dd->ipath_tid_lock); - + spin_lock_init(&dd->ipath_sendctrl_lock); spin_lock_init(&dd->ipath_gpio_lock); spin_lock_init(&dd->ipath_eep_st_lock); mutex_init(&dd->ipath_eep_lock); @@ -372,9 +372,9 @@ static int init_chip_reset(struct ipath_devdata *dd, *pdp = dd->ipath_pd[0]; /* ensure chip does no sends or receives while we re-initialize */ dd->ipath_control = dd->ipath_sendctrl = dd->ipath_rcvctrl = 0U; - ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 0); - ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0); - ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0); + ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, dd->ipath_rcvctrl); + ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); + ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt); if (dd->ipath_portcnt != rtmp) @@ -487,6 +487,7 @@ static void enable_chip(struct ipath_devdata *dd, struct ipath_portdata *pd, int reinit) { u32 val; + unsigned long flags; int i; if (!reinit) @@ -495,11 +496,13 @@ static void enable_chip(struct ipath_devdata *dd, ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, dd->ipath_rcvctrl); + spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); /* Enable PIO send, and update of PIOavail regs to memory. */ dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE | INFINIPATH_S_PIOBUFAVAILUPD; - ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, - dd->ipath_sendctrl); + ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); + ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); + spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); /* * enable port 0 receive, and receive interrupt. other ports @@ -696,6 +699,7 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit) u64 val; struct ipath_portdata *pd = NULL; /* keep gcc4 happy */ gfp_t gfp_flags = GFP_USER | __GFP_COMP; + unsigned long flags; ret = init_housekeeping(dd, &pd, reinit); if (ret) @@ -827,8 +831,12 @@ int ipath_init_chip(struct ipath_devdata *dd, int reinit) ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, ~0ULL&~INFINIPATH_HWE_MEMBISTFAILED); ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0ULL); - ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, - INFINIPATH_S_PIOENABLE); + + spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); + dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE; + ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); + ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); + spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); /* * before error clears, since we expect serdes pll errors during |