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Message-ID: <453C9E76.80700@gmail.com>
Date: Mon, 23 Oct 2006 12:50:30 +0200
From: Jiri Slaby <jirislaby@...il.com>
To: Rolf Eike Beer <eike-kernel@...tec.de>
Cc: Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH 1/4] Char: stallion, convert to pci probing
Rolf Eike Beer wrote:
> Am Sonntag, 22. Oktober 2006 17:48 schrieb Jiri Slaby:
>> stallion, convert to pci probing
>>
>> Convert stallion driver to pci probing instead of pci_dev_get iteration.
>>
>> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
>>
>> ---
>> commit c4a0f4d15661fe74b8c67b0258d5dfbcff57071b
>> tree 5da405798c9d47c7a07b63868e9fec1748908b6b
>> parent fcf3d1f86671d8e01a238935d906356442c92749
>> author Jiri Slaby <ku@...lona.localdomain> Sun, 22 Oct 2006 16:40:25 +0159
>> committer Jiri Slaby <ku@...lona.localdomain> Sun, 22 Oct 2006 16:40:25
>> +0159
>>
>> drivers/char/stallion.c | 165
>> ++++++++++++++++++++++++----------------------- 1 files changed, 83
>> insertions(+), 82 deletions(-)
>>
>> diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
>> index d2cbdb7..592bd6e 100644
>> --- a/drivers/char/stallion.c
>> +++ b/drivers/char/stallion.c
>> @@ -381,8 +381,6 @@ #define STL_CLOSEDELAY (5 * HZ / 10)
>>
>>
>> /**************************************************************************
>> ***/
>>
>> -#ifdef CONFIG_PCI
>> -
>> /*
>> * Define the Stallion PCI vendor and device IDs.
>> */
>> @@ -402,22 +400,19 @@ #endif
>> /*
>> * Define structure to hold all Stallion PCI boards.
>> */
>> -typedef struct stlpcibrd {
>> - unsigned short vendid;
>> - unsigned short devid;
>> - int brdtype;
>> -} stlpcibrd_t;
>> -
>> -static stlpcibrd_t stl_pcibrds[] = {
>> - { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
>> - { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
>> - { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
>> - { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
>> -};
>>
>> -static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds);
>> -
>> -#endif
>> +static struct pci_device_id stl_pcibrds[] = {
>> + { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
>> + .driver_data = BRD_ECH64PCI },
>> + { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
>> + .driver_data = BRD_EASYIOPCI },
>> + { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
>> + .driver_data = BRD_ECHPCI },
>> + { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
>> + .driver_data = BRD_ECHPCI },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(pci, stl_pcibrds);
>>
>>
>> /**************************************************************************
>> ***/
>>
>> @@ -2392,24 +2387,52 @@ static int __init stl_getbrdnr(void)
>> return(-1);
>> }
>>
>> -/*************************************************************************
>> ****/ +static void stl_cleanup_panels(struct stlbrd *brdp)
>> +{
>> + struct stlpanel *panelp;
>> + struct stlport *portp;
>> + unsigned int j, k;
>>
>> -#ifdef CONFIG_PCI
>> + for (j = 0; j < STL_MAXPANELS; j++) {
>> + panelp = brdp->panels[j];
>> + if (panelp == NULL)
>> + continue;
>> + for (k = 0; k < STL_PORTSPERPANEL; k++) {
>> + portp = panelp->ports[k];
>> + if (portp == NULL)
>> + continue;
>> + if (portp->tty != NULL)
>> + stl_hangup(portp->tty);
>> + kfree(portp->tx.buf);
>> + kfree(portp);
>> + }
>> + kfree(panelp);
>> + }
>> +}
>>
>> +/*************************************************************************
>> ****/ /*
>> * We have a Stallion board. Allocate a board structure and
>> * initialize it. Read its IO and IRQ resources from PCI
>> * configuration space.
>> */
>>
>> -static int __init stl_initpcibrd(int brdtype, struct pci_dev *devp)
>> +static int __devinit stl_pciprobe(struct pci_dev *pdev,
>> + const struct pci_device_id *ent)
>> {
>> - struct stlbrd *brdp;
>> + struct stlbrd *brdp;
>> + unsigned int brdtype = ent->driver_data;
>>
>> pr_debug("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
>> - devp->bus->number, devp->devfn);
>> + pdev->bus->number, pdev->devfn);
>> +
>> + if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
>> + return -ENODEV;
>> +
>> + dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
>> + pdev->vendor, pdev->device, pdev->class);
>
> I guess you wanted the dev_info _before_ the return? And why could this ever
> happen?
Nope, I want to know which CLASSes we want to control (to push it into the table
not to take care of it here...).
>> - if (pci_enable_device(devp))
>> + if (pci_enable_device(pdev))
>> return(-EIO);
>> if ((brdp = stl_allocbrd()) == NULL)
>> return(-ENOMEM);
>> @@ -2425,8 +2448,8 @@ static int __init stl_initpcibrd(int brd
>> * so set up io addresses based on board type.
>> */
>> pr_debug("%s(%d): BAR[]=%Lx,%Lx,%Lx,%Lx IRQ=%x\n", __FILE__, __LINE__,
>> - pci_resource_start(devp, 0), pci_resource_start(devp, 1),
>> - pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
>> + pci_resource_start(pdev, 0), pci_resource_start(pdev, 1),
>> + pci_resource_start(pdev, 2), pci_resource_start(pdev, 3), pdev->irq);
>> /*
>> * We have all resources from the board, so let's setup the actual
>
> I would vote for deleting this completely. If someone wants to know lspci and
> sysfs can tell the whole story.
Yup, this is done in patch named 'Char: stallion, prints cleanup'.
>> @@ -2434,63 +2457,52 @@ static int __init stl_initpcibrd(int brd
>> */
>> switch (brdtype) {
>> case BRD_ECHPCI:
>> - brdp->ioaddr2 = pci_resource_start(devp, 0);
>> - brdp->ioaddr1 = pci_resource_start(devp, 1);
>> + brdp->ioaddr2 = pci_resource_start(pdev, 0);
>> + brdp->ioaddr1 = pci_resource_start(pdev, 1);
>> break;
>> case BRD_ECH64PCI:
>> - brdp->ioaddr2 = pci_resource_start(devp, 2);
>> - brdp->ioaddr1 = pci_resource_start(devp, 1);
>> + brdp->ioaddr2 = pci_resource_start(pdev, 2);
>> + brdp->ioaddr1 = pci_resource_start(pdev, 1);
>> break;
>> case BRD_EASYIOPCI:
>> - brdp->ioaddr1 = pci_resource_start(devp, 2);
>> - brdp->ioaddr2 = pci_resource_start(devp, 1);
>> + brdp->ioaddr1 = pci_resource_start(pdev, 2);
>> + brdp->ioaddr2 = pci_resource_start(pdev, 1);
>> break;
>
> Is it really that important to name it pdev instead of devp? This causes tons
> of noise in the patch.
Hmm, that's correct note, but pci device is called pdev in most cases, I wanted
to keep it consistent (and thought that it doesn't want to be in separate patch).
>> + release_region(brdp->ioaddr1, brdp->iosize1);
>> + if (brdp->iosize2 > 0)
>> + release_region(brdp->ioaddr2, brdp->iosize2);
>
> pci_release_region() maybe? This would be a conversion that actually would
> make the code more readable. Since this code path looks PCI only...
I'm definitely going to do this in the next patch serie.
>> - return(0);
>> + stl_brds[brdp->brdnr] = NULL;
>> + kfree(brdp);
>> }
>>
>> -#endif
>> +static struct pci_driver stl_pcidriver = {
>> + .name = "stallion",
>> + .id_table = stl_pcibrds,
>> + .probe = stl_pciprobe,
>> + .remove = __devexit_p(stl_pciremove)
>> +};
>>
>>
>> /**************************************************************************
>> ***/
>>
>> @@ -2537,9 +2549,6 @@ static int __init stl_initbrds(void)
>> * line options or auto-detected on the PCI bus.
>> */
>> stl_argbrds();
>> -#ifdef CONFIG_PCI
>> - stl_findpcibrds();
>> -#endif
>>
>> return(0);
>> }
>> @@ -4778,7 +4787,7 @@ static void stl_sc26198otherisr(struct s
>> */
>> static int __init stallion_module_init(void)
>> {
>> - unsigned int i;
>> + unsigned int i, retval;
>>
>> printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
>>
>> @@ -4787,6 +4796,10 @@ static int __init stallion_module_init(v
>>
>> stl_initbrds();
>>
>> + retval = pci_register_driver(&stl_pcidriver);
>> + if (retval)
>> + goto err;
>> +
>> stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
>> if (!stl_serial)
>
> pci_unregister_driver() here?
Good catch, I'll post a fix (As I see it now, stl_initbrds should be checked for
the returned value too.). I have no idea, why did I omit this changes in fail
paths patch :/.
thanks,
--
http://www.fi.muni.cz/~xslaby/ Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
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