From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="iso-8859-1" From: Trevor Woerner Reply-To: ppc339@vtnet.ca To: linuxppc-dev@lists.linuxppc.org Subject: Re: lost interrupt Date: Wed, 28 May 2003 23:22:59 -0400 References: <200305262341.59883.ppc339@vtnet.ca> In-Reply-To: <200305262341.59883.ppc339@vtnet.ca> MIME-Version: 1.0 Message-Id: <200305282322.59223.ppc339@vtnet.ca> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On May 26, 2003 11:41 pm, Trevor Woerner wrote: > I'm getting the dreaded "lost interrupt" whenever the kernel tries to > access my onboard CF card. It gets a bit stranger, but I think I'm onto something. I'll try to confirm this in the next day or so, but it appears on the surface that my device doesn't give an interrupt between the transfer of each segment in a multi-segment transaction. I enabled the debug statements in 'ide-disk.c' and what I found is that sometimes I receive interrupts and Linux is happy, and other times I don't. After thinking about it a little bit I believe the times I got interrupts were when single segments at a time were being read (ATA command 0x20) and when I didn't get interrupts were when multi-segment reads (still command 0x20 but with number of sectors > 1) were performed. Trevor kernel: 2.4.20-rc1 cpu: PPC405gp device: SanDisk 16MB CF ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/