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s390/pci: try harder to modify a function
In rare situations a PCI function can report a busy condition when we issue the modify pci function command. A temporary busy condition can exceed 1 second but not 2 seconds. Increase the time until we report an error to 2 seconds. Also increase the time we sleep between the retries to reduce the load in this case. Suggested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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1 changed files with 2 additions and 2 deletions
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@ -179,7 +179,7 @@ int clp_add_pci_device(u32 fid, u32 fh, int configured)
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static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
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{
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struct clp_req_rsp_set_pci *rrb;
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int rc, retries = 1000;
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int rc, retries = 100;
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rrb = clp_alloc_block(GFP_KERNEL);
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if (!rrb)
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@ -199,7 +199,7 @@ static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
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retries--;
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if (retries < 0)
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break;
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msleep(1);
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msleep(20);
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}
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} while (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY);
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