From: Michael Ellerman Date: Tue, 17 Feb 2009 00:18:49 +0000 (+0000) Subject: powerpc/pseries: Return req#msi(-x) if request is larger X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d523cc379da57f1c39f5db9c47bdaa94f74727ff;p=linux-2.6-omap-h63xx.git powerpc/pseries: Return req#msi(-x) if request is larger If a driver asks for more MSIs than the devices "req#msi(-x)" property, we currently return -ENOSPC. This doesn't give the driver any chance to make a new request with a number that might work. So if "req#msi(-x)" is less than the request, return its value. To be 100% safe, make sure we return an error if req_msi == 0. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index 073b518338a..081af6d7fa0 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -154,7 +154,11 @@ static int check_req(struct pci_dev *pdev, int nvec, char *prop_name) if (*req_msi < nvec) { pr_debug("rtas_msi: %s requests < %d MSIs\n", prop_name, nvec); - return -ENOSPC; + + if (*req_msi == 0) /* Be paranoid */ + return -ENOSPC; + + return *req_msi; } return 0;