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Commit 6037d6bb authored by Jeff Garzik's avatar Jeff Garzik
Browse files

[libata] ATAPI pad allocation fixes/cleanup 

Use ata_pad_{alloc,free} in two drivers, to factor out common code.

Add ata_pad_{alloc,free} to two other drivers, which needed the padding
but had not been updated.
parent c2cc87ca

drivers/scsi/ahci.c

+6 −5
Original line number Diff line number Diff line
@@ -307,21 +307,22 @@ static int ahci_port_start(struct ata_port *ap) 
	void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);

	void *mem;

	dma_addr_t mem_dma;

	int rc;



	pp = kmalloc(sizeof(*pp), GFP_KERNEL);

	if (!pp)

		return -ENOMEM;

	memset(pp, 0, sizeof(*pp));



	ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, &ap->pad_dma, GFP_KERNEL);

	if (!ap->pad) {

	rc = ata_pad_alloc(ap, dev);

	if (rc) {

		kfree(pp);

		return -ENOMEM;

		return rc;

	}



	mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);

	if (!mem) {

		dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);

		ata_pad_free(ap, dev);

		kfree(pp);

		return -ENOMEM;

	}
@@ -397,7 +398,7 @@ static void ahci_port_stop(struct ata_port *ap) 
	ap->private_data = NULL;

	dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,

			  pp->cmd_slot, pp->cmd_slot_dma);

	dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);

	ata_pad_free(ap, dev);

	kfree(pp);

}

drivers/scsi/libata-core.c

+5 −4
Original line number Diff line number Diff line
@@ -4091,15 +4091,16 @@ static void atapi_packet_task(void *_data) 
int ata_port_start (struct ata_port *ap)

{

	struct device *dev = ap->host_set->dev;

	int rc;



	ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);

	if (!ap->prd)

		return -ENOMEM;



	ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, &ap->pad_dma, GFP_KERNEL);

	if (!ap->pad) {

	rc = ata_pad_alloc(ap, dev);

	if (rc) {

		dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);

		return -ENOMEM;

		return rc;

	}



	DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
@@ -4125,7 +4126,7 @@ void ata_port_stop (struct ata_port *ap) 
	struct device *dev = ap->host_set->dev;



	dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);

	dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);

	ata_pad_free(ap, dev);

}



void ata_host_stop (struct ata_host_set *host_set)

drivers/scsi/sata_mv.c

+23 −8
Original line number Diff line number Diff line
@@ -670,6 +670,11 @@ static void mv_host_stop(struct ata_host_set *host_set) 
	ata_host_stop(host_set);

}



static inline void mv_priv_free(struct mv_port_priv *pp, struct device *dev)

{

	dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);

}



/**

 *      mv_port_start - Port specific init/start routine.

 *      @ap: ATA channel to manipulate
@@ -687,21 +692,23 @@ static int mv_port_start(struct ata_port *ap) 
	void __iomem *port_mmio = mv_ap_base(ap);

	void *mem;

	dma_addr_t mem_dma;

	int rc = -ENOMEM;



	pp = kmalloc(sizeof(*pp), GFP_KERNEL);

	if (!pp) {

		return -ENOMEM;

	}

	if (!pp)

		goto err_out;

	memset(pp, 0, sizeof(*pp));



	mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma, 

				 GFP_KERNEL);

	if (!mem) {

		kfree(pp);

		return -ENOMEM;

	}

	if (!mem)

		goto err_out_pp;

	memset(mem, 0, MV_PORT_PRIV_DMA_SZ);



	rc = ata_pad_alloc(ap, dev);

	if (rc)

		goto err_out_priv;



	/* First item in chunk of DMA memory: 

	 * 32-slot command request table (CRQB), 32 bytes each in size

	 */
@@ -746,6 +753,13 @@ static int mv_port_start(struct ata_port *ap) 
	 */

	ap->private_data = pp;

	return 0;



err_out_priv:

	mv_priv_free(pp, dev);

err_out_pp:

	kfree(pp);

err_out:

	return rc;

}



/**
@@ -768,7 +782,8 @@ static void mv_port_stop(struct ata_port *ap) 
	spin_unlock_irqrestore(&ap->host_set->lock, flags);



	ap->private_data = NULL;

	dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);

	ata_pad_free(ap, dev);

	mv_priv_free(pp, dev);

	kfree(pp);

}

drivers/scsi/sata_sil24.c

+24 −9
Original line number Diff line number Diff line
@@ -635,6 +635,13 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * 
	return IRQ_RETVAL(handled);

}



static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)

{

	const size_t cb_size = sizeof(*pp->cmd_block);



	dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);

}



static int sil24_port_start(struct ata_port *ap)

{

	struct device *dev = ap->host_set->dev;
@@ -642,36 +649,44 @@ static int sil24_port_start(struct ata_port *ap) 
	struct sil24_cmd_block *cb;

	size_t cb_size = sizeof(*cb);

	dma_addr_t cb_dma;

	int rc = -ENOMEM;



	pp = kmalloc(sizeof(*pp), GFP_KERNEL);

	pp = kzalloc(sizeof(*pp), GFP_KERNEL);

	if (!pp)

		return -ENOMEM;

	memset(pp, 0, sizeof(*pp));

		goto err_out;



	pp->tf.command = ATA_DRDY;



	cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);

	if (!cb) {

		kfree(pp);

		return -ENOMEM;

	}

	if (!cb)

		goto err_out_pp;

	memset(cb, 0, cb_size);



	rc = ata_pad_alloc(ap, dev);

	if (rc)

		goto err_out_pad;



	pp->cmd_block = cb;

	pp->cmd_block_dma = cb_dma;



	ap->private_data = pp;



	return 0;



err_out_pad:

	sil24_cblk_free(pp, dev);

err_out_pp:

	kfree(pp);

err_out:

	return rc;

}



static void sil24_port_stop(struct ata_port *ap)

{

	struct device *dev = ap->host_set->dev;

	struct sil24_port_priv *pp = ap->private_data;

	size_t cb_size = sizeof(*pp->cmd_block);



	dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);

	sil24_cblk_free(pp, dev);

	kfree(pp);

}

include/linux/libata.h

+13 −0
Original line number Diff line number Diff line
@@ -777,4 +777,17 @@ static inline unsigned int __ac_err_mask(u8 status) 
	return mask;

}



static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)

{

	ap->pad_dma = 0;

	ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,

				     &ap->pad_dma, GFP_KERNEL);

	return (ap->pad == NULL) ? -ENOMEM : 0;

}



static inline void ata_pad_free(struct ata_port *ap, struct device *dev)

{

	dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);

}



#endif /* __LINUX_LIBATA_H__ */