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Hi Devendra:<BR> <BR> can you please tell me your kernel version?<BR> SA_INTERRUPT is deprecated for many years. it is changed to be IRQF_DISABLED, which is also deprecated since 2.6.35.<BR> in kernel 2.6.35, top half interrupt handler will be called with interrupts <font color="#ff0000">disabled</font>, <BR> <BR> and for SA_SHIRQ, it is changed to be IRQF_SHARED, you should check the return value of request_irq() to see whether your irq can be shared with former <BR> registered irq which use the same int line. suppose you are registering irq19 for usb, and the BT module has reigstered irq19 with IRQF_SHARED flag, then you are lucky enough to reigter correctly for usb. opposite, if BT module registered irq19 without IRQF_SHARED flag, then BT will use irq19 alone, it means your register for usb will fail .<BR> <BR> <BR>Best Regards<br> <BR><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">Date: Wed, 22 Feb 2012 14:56:41 +0530<br>Subject: SA_INTERRUPT or SA_SHIRQ<br>From: devendra.rawat.singh@gmail.com<br>To: kernelnewbies@kernelnewbies.org<br><br>Hi All,<br><br>If I register an ISR using both the flags SA_INTERRUPT and SA_SHIRQ set, what kind of interrupt line will I get a dedicated one or a shared one ?<br>the exact definition is<br><br>request_irq(dev->pci_dev->irq, soc_intr, SA_INTERRUPT | SA_SHIRQ,<br>
MODULE_NAME, dev);<br><br>thanks in advance,<br>Devendra<br>
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