Commit 1c0a387c authored by Jiri Slaby's avatar Jiri Slaby Committed by Linus Torvalds

Char: cyclades, move spin_lock to one place

Lock whole processing in isr, avoid error-prone locking/unlocking in rx/tx
esp.  On fail paths (there was a bug in the past yet).
Signed-off-by: 's avatarJiri Slaby <jirislaby@gmail.com>
Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ce97a097
......@@ -994,7 +994,6 @@ static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
#endif
/* determine the channel & change to that context */
spin_lock(&cinfo->card_lock);
save_xir = (u_char) readb(base_addr + (CyRIR << index));
channel = (u_short) (save_xir & CyIRChannel);
info = &cinfo->ports[channel + chip * 4];
......@@ -1031,7 +1030,6 @@ static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
if (data & info->ignore_status_mask) {
info->icount.rx++;
spin_unlock(&cinfo->card_lock);
return;
}
if (tty_buffer_request_room(tty, 1)) {
......@@ -1116,7 +1114,6 @@ end:
/* end of service */
cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
cy_writeb(base_addr + (CyCAR << index), save_car);
spin_unlock(&cinfo->card_lock);
}
static void cyy_chip_tx(struct cyclades_card *cinfo, int chip,
......@@ -1135,7 +1132,6 @@ static void cyy_chip_tx(struct cyclades_card *cinfo, int chip,
#endif
/* determine the channel & change to that context */
spin_lock(&cinfo->card_lock);
save_xir = (u_char) readb(base_addr + (CyTIR << index));
channel = (u_short) (save_xir & CyIRChannel);
save_car = readb(base_addr + (CyCAR << index));
......@@ -1240,7 +1236,6 @@ end:
/* end of service */
cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
cy_writeb(base_addr + (CyCAR << index), save_car);
spin_unlock(&cinfo->card_lock);
}
static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
......@@ -1251,7 +1246,6 @@ static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
int save_xir, channel, save_car, index = cinfo->bus_index;
/* determine the channel & change to that context */
spin_lock(&cinfo->card_lock);
save_xir = (u_char) readb(base_addr + (CyMIR << index));
channel = (u_short) (save_xir & CyIRChannel);
info = &cinfo->ports[channel + chip * 4];
......@@ -1315,7 +1309,6 @@ end:
/* end of service */
cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
cy_writeb(base_addr + (CyCAR << index), save_car);
spin_unlock(&cinfo->card_lock);
}
/* The real interrupt service routine is called
......@@ -1367,12 +1360,14 @@ static irqreturn_t cyy_interrupt(int irq, void *dev_id)
*/
if (1000 < too_many++)
break;
spin_lock(&cinfo->card_lock);
if (status & CySRReceive) /* rx intr */
cyy_chip_rx(cinfo, chip, base_addr);
if (status & CySRTransmit) /* tx intr */
cyy_chip_tx(cinfo, chip, base_addr);
if (status & CySRModem) /* modem intr */
cyy_chip_modem(cinfo, chip, base_addr);
spin_unlock(&cinfo->card_lock);
}
}
} while (had_work);
......
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