From: Arnd Bergmann <arnd@arndb.de> To: netdev@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de>, linux-pcmcia@lists.infradead.org, jeffrey.t.kirsher@intel.com, kas@fi.muni.cz, davem@davemloft.net, linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/4] net: am2150: fix nmclan_cs.c shared interrupt handling Date: Wed, 28 Jan 2015 15:15:04 +0100 [thread overview] Message-ID: <1422454504-439085-5-git-send-email-arnd@arndb.de> (raw) In-Reply-To: <1422454504-439085-1-git-send-email-arnd@arndb.de> A recent patch tried to work around a valid warning for the use of a deprecated interface by blindly changing from the old pcmcia_request_exclusive_irq() interface to pcmcia_request_irq(). This driver has an interrupt handler that is not currently aware of shared interrupts, but can be easily converted to be. At the moment, the driver reads the interrupt status register repeatedly until it contains only zeroes in the interesting bits, and handles each bit individually. This patch adds the missing part of returning IRQ_NONE in case none of the bits are set to start with, so we can move on to the next interrupt source. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 5f5316fcd08ef7 ("am2150: Update nmclan_cs.c to use update PCMCIA API") --- drivers/net/ethernet/amd/nmclan_cs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/amd/nmclan_cs.c b/drivers/net/ethernet/amd/nmclan_cs.c index 5b22764ba88d..27245efe9f50 100644 --- a/drivers/net/ethernet/amd/nmclan_cs.c +++ b/drivers/net/ethernet/amd/nmclan_cs.c @@ -952,6 +952,8 @@ static irqreturn_t mace_interrupt(int irq, void *dev_id) do { /* WARNING: MACE_IR is a READ/CLEAR port! */ status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR); + if (!(status & ~MACE_IMR_DEFAULT) && IntrCnt == MACE_MAX_IR_ITERATIONS) + return IRQ_NONE; pr_debug("mace_interrupt: irq 0x%X status 0x%X.\n", irq, status); -- 2.1.0.rc2
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From: arnd@arndb.de (Arnd Bergmann) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/4] net: am2150: fix nmclan_cs.c shared interrupt handling Date: Wed, 28 Jan 2015 15:15:04 +0100 [thread overview] Message-ID: <1422454504-439085-5-git-send-email-arnd@arndb.de> (raw) In-Reply-To: <1422454504-439085-1-git-send-email-arnd@arndb.de> A recent patch tried to work around a valid warning for the use of a deprecated interface by blindly changing from the old pcmcia_request_exclusive_irq() interface to pcmcia_request_irq(). This driver has an interrupt handler that is not currently aware of shared interrupts, but can be easily converted to be. At the moment, the driver reads the interrupt status register repeatedly until it contains only zeroes in the interesting bits, and handles each bit individually. This patch adds the missing part of returning IRQ_NONE in case none of the bits are set to start with, so we can move on to the next interrupt source. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 5f5316fcd08ef7 ("am2150: Update nmclan_cs.c to use update PCMCIA API") --- drivers/net/ethernet/amd/nmclan_cs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/amd/nmclan_cs.c b/drivers/net/ethernet/amd/nmclan_cs.c index 5b22764ba88d..27245efe9f50 100644 --- a/drivers/net/ethernet/amd/nmclan_cs.c +++ b/drivers/net/ethernet/amd/nmclan_cs.c @@ -952,6 +952,8 @@ static irqreturn_t mace_interrupt(int irq, void *dev_id) do { /* WARNING: MACE_IR is a READ/CLEAR port! */ status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR); + if (!(status & ~MACE_IMR_DEFAULT) && IntrCnt == MACE_MAX_IR_ITERATIONS) + return IRQ_NONE; pr_debug("mace_interrupt: irq 0x%X status 0x%X.\n", irq, status); -- 2.1.0.rc2
next prev parent reply other threads:[~2015-01-28 14:15 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-01-28 14:15 [PATCH 0/4] net: driver fixes from arm randconfig builds Arnd Bergmann 2015-01-28 14:15 ` Arnd Bergmann 2015-01-28 14:15 ` [PATCH 1/4] net: cs89x0: always build platform code if !HAS_IOPORT_MAP Arnd Bergmann 2015-01-28 14:15 ` Arnd Bergmann 2015-01-28 14:15 ` [PATCH 2/4] net: wan: add missing virt_to_bus dependencies Arnd Bergmann 2015-01-28 14:15 ` Arnd Bergmann 2015-01-28 16:19 ` Jan Kasprzak 2015-01-28 16:19 ` Jan Kasprzak 2015-01-28 14:15 ` [PATCH 3/4] net: lance,ni64: don't build for ARM Arnd Bergmann 2015-01-28 14:15 ` Arnd Bergmann 2015-01-28 14:15 ` Arnd Bergmann [this message] 2015-01-28 14:15 ` [PATCH 4/4] net: am2150: fix nmclan_cs.c shared interrupt handling Arnd Bergmann 2015-01-29 23:08 ` [PATCH 0/4] net: driver fixes from arm randconfig builds David Miller 2015-01-29 23:08 ` David Miller
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