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| author | Manu Abraham <abraham.manu@gmail.com> | 2009-12-04 05:34:19 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-01-17 11:55:41 -0200 |
| commit | f684336bba673b6656cb98144130ab52dafc3240 (patch) | |
| tree | d50afc70a0350c74250fcd48a3993bb3856348ca /drivers/media/dvb/mantis/mantis_hif.c | |
| parent | 616f75e1979f5bd1f3241581c720349c2c31f6e7 (diff) | |
| download | linux-f684336bba673b6656cb98144130ab52dafc3240.tar.gz linux-f684336bba673b6656cb98144130ab52dafc3240.tar.bz2 linux-f684336bba673b6656cb98144130ab52dafc3240.zip | |
V4L/DVB (13788): [Mantis CA] use a lock for the relevant CI Read/Write operations
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/mantis/mantis_hif.c')
| -rw-r--r-- | drivers/media/dvb/mantis/mantis_hif.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/media/dvb/mantis/mantis_hif.c b/drivers/media/dvb/mantis/mantis_hif.c index 3368253aea6c..b1e1aa0f5c12 100644 --- a/drivers/media/dvb/mantis/mantis_hif.c +++ b/drivers/media/dvb/mantis/mantis_hif.c @@ -92,6 +92,7 @@ int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) u32 hif_addr = 0, data, count = 4; dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num); + mutex_lock(&ca->ca_lock); hif_addr &= ~MANTIS_GPIF_PCMCIAREG; hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; hif_addr |= MANTIS_HIF_STATUS; @@ -104,9 +105,11 @@ int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) if (mantis_hif_sbuf_opdone_wait(ca) != 0) { dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num); + mutex_unlock(&ca->ca_lock); return -EREMOTEIO; } data = mmread(MANTIS_GPIF_DIN); + mutex_unlock(&ca->ca_lock); dprintk(verbose, MANTIS_DEBUG, 1, "Mem Read: 0x%02x", data); return (data >> 24) & 0xff; } @@ -118,6 +121,7 @@ int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) u32 hif_addr = 0; dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num); + mutex_lock(&ca->ca_lock); hif_addr &= ~MANTIS_GPIF_HIFRDWRN; hif_addr &= ~MANTIS_GPIF_PCMCIAREG; hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; @@ -130,9 +134,11 @@ int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) if (mantis_hif_write_wait(ca) != 0) { dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); + mutex_unlock(&ca->ca_lock); return -EREMOTEIO; } dprintk(verbose, MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)", data, addr); + mutex_unlock(&ca->ca_lock); return 0; } @@ -143,6 +149,7 @@ int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) u32 data, hif_addr = 0; dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num); + mutex_lock(&ca->ca_lock); hif_addr &= ~MANTIS_GPIF_PCMCIAREG; hif_addr |= MANTIS_GPIF_PCMCIAIOM; hif_addr |= MANTIS_HIF_STATUS; @@ -155,11 +162,13 @@ int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) if (mantis_hif_sbuf_opdone_wait(ca) != 0) { dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); + mutex_unlock(&ca->ca_lock); return -EREMOTEIO; } data = mmread(MANTIS_GPIF_DIN); dprintk(verbose, MANTIS_DEBUG, 1, "I/O Read: 0x%02x", data); udelay(50); + mutex_unlock(&ca->ca_lock); return (u8) data; } @@ -170,6 +179,7 @@ int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) u32 hif_addr = 0; dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num); + mutex_lock(&ca->ca_lock); hif_addr &= ~MANTIS_GPIF_PCMCIAREG; hif_addr &= ~MANTIS_GPIF_HIFRDWRN; hif_addr |= MANTIS_GPIF_PCMCIAIOM; @@ -181,9 +191,11 @@ int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) if (mantis_hif_write_wait(ca) != 0) { dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); + mutex_unlock(&ca->ca_lock); return -EREMOTEIO; } dprintk(verbose, MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)", data, addr); + mutex_unlock(&ca->ca_lock); udelay(50); return 0; @@ -201,6 +213,7 @@ int mantis_hif_init(struct mantis_ca *ca) init_waitqueue_head(&ca->hif_opdone_wq); init_waitqueue_head(&ca->hif_write_wq); + mutex_lock(&ca->ca_lock); irqcfg = mmread(MANTIS_GPIF_IRQCFG); irqcfg = MANTIS_MASK_BRRDY | MANTIS_MASK_WRACK | @@ -210,6 +223,7 @@ int mantis_hif_init(struct mantis_ca *ca) MANTIS_MASK_OVFLW; mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); + mutex_unlock(&ca->ca_lock); return 0; } @@ -220,7 +234,9 @@ void mantis_hif_exit(struct mantis_ca *ca) u32 irqcfg; dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num); + mutex_lock(&ca->ca_lock); irqcfg = mmread(MANTIS_GPIF_IRQCFG); irqcfg &= ~MANTIS_MASK_BRRDY; mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); + mutex_unlock(&ca->ca_lock); } |